|Caves of the National Parks: The Wonder Beneath VHS
Highlights Carlsbad Caverns, Mammoth Cave, and the Hawaiian Islands volcanic caves.
|K - 2||VHS||$59.95|
|Ever-Changing Earth for Students: Volcanoes DVD
Unearths the details of volcanic activity, traces volcano patterns across the continents, tours the active region of Hawaii, and shows how scientists monitor eruptions.
|K - 5||DVD||$29.95|
|Science Facts and Fun: How Much Does the Earth Weigh? DVD
Weight and mass are defined, and the concept of gravity is introduced.
|K - 5||DVD||$49.00|